公开(公告)号：US09635701B2

公开(公告)日：2017-04-25

申请号：US14679179

申请日：2015-04-06

Applicant: Korea Electronics Technology Institute

Inventor： Tai Gil Kwon ,  Jin Woong Cho ,  Yong Seong Kim

IPC: H04W84/20 ,  H04W24/06 ,  H04W76/04 ,  H04W40/24

CPC classification number: H04W76/25 ,  H04W40/244 ,  H04W84/20

Abstract: Provided is a method for determining network link quality between a master station and slave stations in a wireless network system having a synchronous superframe structure. The method for determining link quality in a wireless network system includes determining whether the current station is a master or a slave, when the current station is a master, comparing a time value during which the latest packets were received from slaves and a maximum time value during which the slaves are not obliged to exchange packets with the master after accessing a network, and determining link quality between the slaves and the master according to the comparison result.

公开(公告)号：US11264843B1

公开(公告)日：2022-03-01

申请号：US17127419

申请日：2020-12-18

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Seok Lim ,  Hae Yong Jung ,  Tai Gil Kwon ,  Yong Seong Kim ,  Yongju Park

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/40 ,  B60L53/55 ,  B60L53/30 ,  B60L53/124

Abstract: The present invention provides a system tar wireless power transmission, wherein the system is a system for wireless power transmission detecting a foreign object, including a power transmitting coil for transmitting AC power, a power receiving coil for receiving the AC power transmitted from the power transmitting coil wherein the power receiving coil is spaced apart from the power transmitting coil, and a detection circuit for detecting a foreign object located between the power transmitting coil and the power receiving coil wherein a first resistor and a first detection coil connected in series, and a second resistor and a second detection coil connected in series are connected in parallel, and wherein at least one of the first detection coil and the second detection coil is disposed between the power transmitting coil and the power receiving coil.

公开(公告)号：US12199450B2

公开(公告)日：2025-01-14

申请号：US18058688

申请日：2022-11-23

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Ju Park ,  Yong Seok Lim ,  Yong Seong Kim ,  Hae Yong Jung ,  Hye Jung Kim

IPC: G01C3/08 ,  G01V8/18 ,  H02J50/12 ,  H02J50/60

Abstract: A system for foreign object detection (FOD) in wireless power transfer is proposed. The system may include a balanced coil which is disposed between a transmitter coil and a receiver coil and which includes a Maxwell bridge circuit. The system may also include a temperature sensor configured to measure a temperature of the transmitter coil. The system may further include a processor configured to determine whether an FO is present between the transmitter coil and the receiver coil on the basis of voltage values detected at both ends of the bridge circuit. The FOD system can recognize the FO by finding a maximum resonant frequency at which a metal reacts using resonant frequency sweeping in a bridge circuit.

公开(公告)号：US20230387725A1

公开(公告)日：2023-11-30

申请号：US18058688

申请日：2022-11-23

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Ju Park ,  Yong Seok Lim ,  Yong Seong Kim ,  Hae Yong Jung ,  Hye Jung Kim

IPC: H02J50/60 ,  H02J50/12 ,  G01V8/18

CPC classification number: H02J50/60 ,  H02J50/12 ,  G01V8/18

Abstract: A system for foreign object detection (FOD) in wireless power transfer is proposed. The system may include a balanced coil which is disposed between a transmitter coil and a receiver coil and which includes a Maxwell bridge circuit. The system may also include a temperature sensor configured to measure a temperature of the transmitter coil. The system may further include a processor configured to determine whether an FO is present between the transmitter coil and the receiver coil on the basis of voltage values detected at both ends of the bridge circuit. The FOD system can recognize the FO by finding a maximum resonant frequency at which a metal reacts using resonant frequency sweeping in a bridge circuit.

公开(公告)号：US09468011B2

公开(公告)日：2016-10-11

申请号：US14264449

申请日：2014-04-29

Applicant: Korea Electronics Technology Institute

Inventor： Tai Gil Kwon ,  Jin Woong Cho ,  Yong Seong Kim

IPC: H04W72/04 ,  H04W72/08 ,  H04W84/18

CPC classification number: H04W72/085 ,  H04W84/18

Abstract: The present invention relates to a system and method for changing a wireless personal area network (WPAN) channel when the quality of communication is degraded due to a change of a wireless environment. The system according to the present invention includes slaves configured to transmit/receive data, and a master connected to the slaves and configured to obtain communication state information of the slaves and select an adjacent channel search slave from among the slaves according to the obtained communication state information of the slaves.

Abstract translation: 本发明涉及一种当通信质量由于无线环境的变化而恶化时，改变无线个域网（WPAN）信道的系统和方法。 根据本发明的系统包括被配置为发送/接收数据的从设备和连接到从站的主设备，并且被配置为获得从站的通信状态信息，并且根据获得的通信状态从从站中选择相邻信道搜索从站 奴隶的信息。